Curioustab
Aptitude
General Knowledge
Verbal Reasoning
Computer Science
Interview
Aptitude
General Knowledge
Verbal Reasoning
Computer Science
Interview
Home
»
Electronics and Communication Engineering
»
Materials and Components
Electrical contact materials used in switches, brushes, relay must possess
high thermal conductivity and high melting point
low thermal conductivity and low melting point
high thermal conductivity and low melting point
low thermal conductivity and high melting point
Correct Answer:
high thermal conductivity and high melting point
Explanation:
Heat generated at contact should be dissipated quickly and contact should not melt.
← Previous Question
Next Question→
More Questions from
Materials and Components
The unit for mmf is
If a small amount of Cu is added to Ni conductor, then
A conductor carries 10 A current in + x direction and is lying in a field having a flux density 0.2 T directed along + z direction. The magnitude of force per metre length and direction are
The core of a solenoid is made of material of relative permeability μr. A small cavity area dA and length dl is cut in the core. If it is desired that flux density in the cavity should be equal to B0
Assertion (A): Hall effect is used to determine whether the semi- conductor is p or n type. Reason (R): Under the influence of field, holes and electrons move in opposite direction.
In terms of Planck's constant h, the orbital angular momentum of an electron is
The induced magnetic dipole moment is independent of the permanent magnetic dipole moment.
When a material is in superconducting state and a magnetic field is applied
Nickel is a non-magnetic material.
An electron is moving around a proton, in a circle of radius R. If flux density in the region is increased from zero to B, the force on the electron is
Discussion & Comments
No comments yet. Be the first to comment!
Name:
Comment:
Post Comment
Join Discussion
Discussion & Comments